/// <summary>
/// When the mouse is pressed in the 3D view, we want to select the clicked object.
/// </summary>
/// <param name="viewport">The viewport that was clicked</param>
/// <param name="e">The click event</param>
protected override void MouseDown3D(Viewport3D viewport, ViewportEvent e)
{
// Do not perform selection if space is down
if (Sledge.Settings.View.Camera3DPanRequiresMouseClick && KeyboardState.IsKeyDown(Keys.Space))
{
return;
}
// First, get the ray that is cast from the clicked point along the viewport frustrum
var ray = viewport.CastRayFromScreen(e.X, e.Y);
// Grab all the elements that intersect with the ray
var hits = Document.Map.WorldSpawn.GetAllNodesIntersectingWith(ray);
// Sort the list of intersecting elements by distance from ray origin
IntersectingObjectsFor3DSelection = hits
.Select(x => new { Item = x, Intersection = GetIntersectionPoint(x, ray) })
.Where(x => x.Intersection != null)
.OrderBy(x => (x.Intersection - ray.Start).VectorMagnitude())
.Select(x => x.Item)
.ToList();
// By default, select the closest object
ChosenItemFor3DSelection = IntersectingObjectsFor3DSelection.FirstOrDefault();
// If Ctrl is down and the object is already selected, we should deselect it instead.
var list = new[] { ChosenItemFor3DSelection };
var desel = ChosenItemFor3DSelection != null && KeyboardState.Ctrl && ChosenItemFor3DSelection.IsSelected;
SetSelected(desel ? list : null, desel ? null : list, !KeyboardState.Ctrl, IgnoreGrouping());
State.ActiveViewport = null;
}
/// <summary>
/// The select tool captures the mouse wheel when the mouse is down in the 3D viewport
/// </summary>
/// <returns>True if the select tool is capturing wheel events</returns>
public override bool IsCapturingMouseWheel()
{
return(IntersectingObjectsFor3DSelection != null &&
IntersectingObjectsFor3DSelection.Any() &&
ChosenItemFor3DSelection != null);
}
/// <summary>
/// When the mouse wheel is scrolled while the mouse is down in the 3D view, cycle through the candidate elements.
/// </summary>
/// <param name="viewport">The viewport that was scrolled</param>
/// <param name="e">The scroll event</param>
public override void MouseWheel(ViewportBase viewport, ViewportEvent e)
{
if (WidgetAction((w, vp, ev) => w.MouseWheel(vp, ev), viewport, e))
{
return;
}
// If we're not in 3D cycle mode, carry on
if (!(viewport is Viewport3D) ||
IntersectingObjectsFor3DSelection == null ||
ChosenItemFor3DSelection == null)
{
return;
}
var desel = new List <MapObject>();
var sel = new List <MapObject>();
// Select (or deselect) the current element
if (ChosenItemFor3DSelection.IsSelected)
{
desel.Add(ChosenItemFor3DSelection);
}
else
{
sel.Add(ChosenItemFor3DSelection);
}
// Get the index of the current element
var index = IntersectingObjectsFor3DSelection.IndexOf(ChosenItemFor3DSelection);
if (index < 0)
{
return;
}
// Move the index in the mouse wheel direction, cycling if needed
var dir = e.Delta / Math.Abs(e.Delta);
index = (index + dir) % IntersectingObjectsFor3DSelection.Count;
if (index < 0)
{
index += IntersectingObjectsFor3DSelection.Count;
}
ChosenItemFor3DSelection = IntersectingObjectsFor3DSelection[index];
// Select (or deselect) the new current element
if (ChosenItemFor3DSelection.IsSelected)
{
desel.Add(ChosenItemFor3DSelection);
}
else
{
sel.Add(ChosenItemFor3DSelection);
}
SetSelected(desel, sel, false, IgnoreGrouping());
State.ActiveViewport = null;
}
